sandwich oil cooler adapter and oil cooler questions Options

[type47]

After track sessions this past weekend, oil temps as indicated by a dipstick thermometer (Mainely Custom item) indicated temps of about 252 F after 20 minute sessions (ambient temps in the 60's). The engine is a Euro D-Jet with 20-50 Brad Penn. The engine that was in the car when I bought it (not the same engine as in the car now) has a sandwich oil cooler adapter and the oil cooler is still mounted on the car and I think I will hook it up again. Two questions; first is the indentification of the outlet and inlet on the adapter; which is which or how do I figure out which one the oil should exit from and which should the oil return. Second, on a radiator style oil cooler, do you hook it up so that oil goes in the "top" and filters/goes down the coils and exits out the bottom connection or goes in the bottom and pressure feeds up the cooler and exits out the top to return? TIA